mirror of
https://source.denx.de/u-boot/u-boot.git
synced 2025-10-31 08:21:36 +01:00
d24c7fbcc5
At present there are only 8-bit and 32-bit read/write routines in the rtc uclass driver. This adds the 16-bit support. Signed-off-by: Bin Meng <bmeng.cn@gmail.com> Reviewed-by: Simon Glass <sjg@chromium.org>
127 lines
2.1 KiB
C
127 lines
2.1 KiB
C
/*
|
|
* (C) Copyright 2015 Google, Inc
|
|
* Written by Simon Glass <sjg@chromium.org>
|
|
*
|
|
* SPDX-License-Identifier: GPL-2.0+
|
|
*/
|
|
|
|
#include <common.h>
|
|
#include <dm.h>
|
|
#include <errno.h>
|
|
#include <rtc.h>
|
|
|
|
int dm_rtc_get(struct udevice *dev, struct rtc_time *time)
|
|
{
|
|
struct rtc_ops *ops = rtc_get_ops(dev);
|
|
|
|
assert(ops);
|
|
if (!ops->get)
|
|
return -ENOSYS;
|
|
return ops->get(dev, time);
|
|
}
|
|
|
|
int dm_rtc_set(struct udevice *dev, struct rtc_time *time)
|
|
{
|
|
struct rtc_ops *ops = rtc_get_ops(dev);
|
|
|
|
assert(ops);
|
|
if (!ops->set)
|
|
return -ENOSYS;
|
|
return ops->set(dev, time);
|
|
}
|
|
|
|
int dm_rtc_reset(struct udevice *dev)
|
|
{
|
|
struct rtc_ops *ops = rtc_get_ops(dev);
|
|
|
|
assert(ops);
|
|
if (!ops->reset)
|
|
return -ENOSYS;
|
|
return ops->reset(dev);
|
|
}
|
|
|
|
int rtc_read8(struct udevice *dev, unsigned int reg)
|
|
{
|
|
struct rtc_ops *ops = rtc_get_ops(dev);
|
|
|
|
assert(ops);
|
|
if (!ops->read8)
|
|
return -ENOSYS;
|
|
return ops->read8(dev, reg);
|
|
}
|
|
|
|
int rtc_write8(struct udevice *dev, unsigned int reg, int val)
|
|
{
|
|
struct rtc_ops *ops = rtc_get_ops(dev);
|
|
|
|
assert(ops);
|
|
if (!ops->write8)
|
|
return -ENOSYS;
|
|
return ops->write8(dev, reg, val);
|
|
}
|
|
|
|
int rtc_read16(struct udevice *dev, unsigned int reg, u16 *valuep)
|
|
{
|
|
u16 value = 0;
|
|
int ret;
|
|
int i;
|
|
|
|
for (i = 0; i < sizeof(value); i++) {
|
|
ret = rtc_read8(dev, reg + i);
|
|
if (ret < 0)
|
|
return ret;
|
|
value |= ret << (i << 3);
|
|
}
|
|
|
|
*valuep = value;
|
|
return 0;
|
|
}
|
|
|
|
int rtc_write16(struct udevice *dev, unsigned int reg, u16 value)
|
|
{
|
|
int i, ret;
|
|
|
|
for (i = 0; i < sizeof(value); i++) {
|
|
ret = rtc_write8(dev, reg + i, (value >> (i << 3)) & 0xff);
|
|
if (ret)
|
|
return ret;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
int rtc_read32(struct udevice *dev, unsigned int reg, u32 *valuep)
|
|
{
|
|
u32 value = 0;
|
|
int ret;
|
|
int i;
|
|
|
|
for (i = 0; i < sizeof(value); i++) {
|
|
ret = rtc_read8(dev, reg + i);
|
|
if (ret < 0)
|
|
return ret;
|
|
value |= ret << (i << 3);
|
|
}
|
|
|
|
*valuep = value;
|
|
return 0;
|
|
}
|
|
|
|
int rtc_write32(struct udevice *dev, unsigned int reg, u32 value)
|
|
{
|
|
int i, ret;
|
|
|
|
for (i = 0; i < sizeof(value); i++) {
|
|
ret = rtc_write8(dev, reg + i, (value >> (i << 3)) & 0xff);
|
|
if (ret)
|
|
return ret;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
UCLASS_DRIVER(rtc) = {
|
|
.name = "rtc",
|
|
.id = UCLASS_RTC,
|
|
};
|